102421625 has 8 divisors (see below), whose sum is σ = 127822344. Its totient is φ = 81937200.

The previous prime is 102421607. The next prime is 102421637. The reversal of 102421625 is 526124201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7573504 + 94848121 = 2752^2 + 9739^2 .

It is not a de Polignac number, because 102421625 - 2²⁰ = 101373049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102421625.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409562 + ... + 409811.

It is an arithmetic number, because the mean of its divisors is an integer number (15977793).

Almost surely, 2^102421625 is an apocalyptic number.

It is an amenable number.

102421625 is a deficient number, since it is larger than the sum of its proper divisors (25400719).

102421625 is an frugal number, since it uses more digits than its factorization.

102421625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819388 (or 819378 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 102421625 is about 10120.3569601077. The cubic root of 102421625 is about 467.8757690687.

Adding to 102421625 its reverse (526124201), we get a palindrome (628545826).

The spelling of 102421625 in words is "one hundred two million, four hundred twenty-one thousand, six hundred twenty-five".